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What type gear oil for tranny?

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Old 01-09-2017, 08:23 AM
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Default What type gear oil for tranny?
We've got a 2006 2500 with the Cummins diesel and a standard tranny (GK56 by Mercedes). What kind of tranny fluid does it use? One place tells me to use ATF-4; another place tells me to use straight gear oil.

We're getting ready to put a clutch in it, and I don't want to ruin the tranny afterwards!

Thanks.
 
Last edited by armynurse; 01-09-2017 at 09:02 AM.
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Old 01-09-2017, 07:09 PM
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Check your owners manual. I do believe it is ATF + 4
 
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Old 01-10-2017, 08:11 AM
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Should be stated in your owners manual. If you don't have one, you can go here and download one for free.


https://www.mopar.com/ramtrucks/en-u...er-manual.html
 
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Old 01-19-2017, 07:44 PM
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You may use ATF+4 or Valvoline Max life ATF fluid, the Valvoline fluid covers the ATF +4 specs and may be cheaper. DO NOT USE STRAIGHT GEAR OIL!
 
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Old 01-21-2017, 02:58 PM
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Apparently, that's a manual tranny. ATF may not be a good idea.
 
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Old 01-21-2017, 03:47 PM
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Sorry, if it's manual gear Oil would be required. Just need to find out the correct weight.
 
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Old 01-21-2017, 09:10 PM
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Better check. Many manual transmission use ATF
 
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Old 01-21-2017, 09:15 PM
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Okay Benz recommends 75/90 gear oil. Ram says ATF +4. IMO I would use what Benz says. They built it.
 
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